using System;
using System.IO;

namespace Org.BouncyCastle.Crypto.Tls
{
	internal class TlsStream
		: Stream
	{
		private readonly TlsProtocolHandler handler;

		internal TlsStream(
			TlsProtocolHandler handler)
		{
			this.handler = handler;
		}

		public override bool CanRead
		{
			get { return !handler.IsClosed; }
		}

		public override bool CanSeek
		{
			get { return false; }
		}

		public override bool CanWrite
		{
			get { return !handler.IsClosed; }
		}

		public override void Close()
		{
			handler.Close();
		}

		public override void Flush()
		{
			handler.Flush();
		}

        public override long Length
		{
			get { throw new NotSupportedException(); }
		}

		public override long Position
        {
            get { throw new NotSupportedException(); }
            set { throw new NotSupportedException(); }
        }

		public override int Read(byte[]	buf, int off, int len)
		{
			return this.handler.ReadApplicationData(buf, off, len);
		}

		public override int ReadByte()
		{
			byte[] buf = new byte[1];
			if (this.Read(buf, 0, 1) <= 0)
				return -1;
			return buf[0];
		}

		public override long Seek(long offset, SeekOrigin origin)
		{
			throw new NotSupportedException();
		}

        public override void SetLength(long value)
		{
			throw new NotSupportedException();
		}

		public override void Write(byte[] buf, int off, int len)
		{
			this.handler.WriteData(buf, off, len);
		}

		public override void WriteByte(byte b)
		{
			this.handler.WriteData(new byte[] { b }, 0, 1);
		}
	}
}
